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Design and Prototyping of Direct Torque Control of Induction Motors in FPGAs

Design and Prototyping of Direct Torque Control of Induction Motors in FPGAs,10.1109/SBCCI.2003.1232814,Sandro Ferreira,Felipe Haffner,Luís Fernando P

Design and Prototyping of Direct Torque Control of Induction Motors in FPGAs   (Citations: 4)
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This work presents an implementation of a Direct Torque Control (DTC) strategy, which is used to control induction motors. Following a tendency in the research area, the algorithm proposed is implemented in an unique FPGA substrate, which allows for a faster validation andsimplifies the control structure. A binary format is used with a variable word-size approach, which permits to reduce truncation through the calculation processes, resulting in smaller errors without increasing excessively hardware area in the prototyping step. Matlab is used tovalidate the algorithm. The calculation error between Matlab's double precision representation and the proposed alternative is small and can be neglected in DTC control.
Conference: sbcci , pp. 105-110, 2003
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    • ...Unfortunately, it is not easy to implement DTC in FPGA device, especially in performing the torque and flux estimation Complex digital computations are involved, such as binary multiplications, integral operation and also a square root calculation targeted for FPGA implementation; the difficulties of which have been addressed in several researches [11-15]...
    • ...Ferreira [13] also has difficulty in increasing the sampling frequency, and he only succeeded in reducing the sampling time to 25μs...
    • ...As a matter of fact, [13] proposed architecture should be implemen separating the computation of sta from the estimation of the stator can be considered as an immediate...
    • ...Recent DTC implementation as in [5, 16 32-bit format where some bits might be left u bit format is not appropriate to achie implementation [13, 16]...
    • ...Therefore, var approach [13] is adopted for this implement the redundant bits can be eliminated by trunc minimize the hardware resources usage...

    Tole Sutiknoet al. FPGA based high precision torque and flux estimator of direct torque c...

    • ...initially implemented on Digital Signal Processing (DSP) based hardware associated with an ASIC (Application Specific Integrated Circuit)[4]...

    Sarat Kumar Sahooet al. Vlsi design approach to high-performance direct torque control of indu...

    • ...Previous work has reported the use of FPGAs in digital feedback control systems, such as magnetic bearings [4], pulsewidth modulation (PWM) inverters [5], induction motors [6], ac/dc converters [7], variable-speed drives [8], and antiwindup compensation of controllers [9]...
    • ...Even though a longer word length will reduce quantization effects, it will result in an increase in hardware resources; however, shorter word lengths will affect controller precision, causing an increase in control error or destabilization of the system [6]...

    Yuen Fong Chanet al. Design and Implementation of Modular FPGA-Based PID Controllers

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